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Meniscus behaviors and capillary pressures in capillary channels having various cross-sectional geometries

Chinese Journal of Chemical Engineering 2018年第10期26卷 2014-2022页

作者： Yicun Tang Jingchun Min Xuan Zhang guiling liu Department of Engineering Mechanics Tsinghua University Beijing 100084 China epartment of Energy and Power Engineering Tsinghua University Beijing 100084 China

A numerical study has been conducted to simulate the liquid/gas interface(meniscus) behaviors and capillary pressures in various capillary channels using the volume of fluid(VOF) method. Calculations are performed for four channels whose cross-sectional shapes are circle, regular hexagon, square and equilateral triangle and for four solid/liquid contact angles of 30°, 60°, 120° and 150°. No calculation is needed for the contact angle of 90° because the liquid/gas interface in this case can be thought to be a plane surface. In the calculations, the liquid/gas interface in each channel is assumed to have a flat surface at the initial time, it changes towards its due shape thereafter, which is induced by the combined action of the surface tension and contact angle. After experiencing a period of damped oscillation, it stabilizes at a certain geometry. The interface dynamics and capillary pressures are compared among different channels under three categories including the equal inscribed circle radius, equal area, and equal circumscribed circle radius. The capillary pressure in the circular channel obtained from the simulation agrees well with that given by the Young–Laplace equation, supporting the reliability of the numerical model. The channels with equal inscribed circle radius yield the closest capillary pressures, while those with equal circumscribed circle radius give the most scattered capillary pressures,with those with equal area living in between. A correlation is developed to calculate the equivalent radius of a polygonal channel, which can be used to compute the capillary pressure in such a channel by combination with the Young–Laplace equation.

关键词： Capillary phenomenon Polygonal channel Meniscus shape Capillary pressure

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A new glucosyltransferase UGT78 from Iris sanguinea is a putative negative regulator in cadmium stress response

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Journal of Forestry Research 2024年第6期35卷 344-355页

作者： Gongfa Shi guiling liu Huijun liu Lei Wang Aerdake Kuwantai Yu Du Ling Wang Xiaolei Xi Rusong Chai College of Landscape Architecture Northeast Forestry UniversityHarbin 150040People’s Republic of China Taiyuan Botanical Garden Taiyuan 030025People’s Republic of China Heilongjiang Forest Botanical Garden Harbin 150040People’s Republic of China

Urbanization has resulted in a significant degra-dation of soil quality,subjecting plants to persistent abiotic stressors such as heavy metal pollution,salinization,and ***-glycosyltransferases(UGTs)participate in protein glycosylation,secondary metabolite synthesis,and detoxification of exogenous toxic *** sanguinea Donn ex Hornem exhibits a high degree of resistance to various abiotic *** enhance the plant’s response to adversity,a novel glycosyltransferase belonging to the UGT78 family,encoding flavonoid 3-O-glucosyltransferase(UF3GT),was cloned from the monocot species *** with the control group,overexpression of IsUGT78 enhanced sensitivity to cadmium stress,while showing no significant impact under NaCl and d-sorbitol *** cadmium treatment,arabidopsis exoge-nously transformed with the IsUGT78 gene possessed lower germination,fresh weight,root length,and chlorophyll con-tent and increased malondialdehyde content than the wild type *** addition,metabolomics in leaves led to the identification of 299 flavonoid metabolites,eight and 127 which were significantly up-and down-regulated,respec-tively,in the transgenic *** note,all eight upregulated flavonoid compounds were *** that arabi-dopsis,which exogenously expresses the IsUGT78 gene,has reduced resistance to cadmium,IsUGT78 may lead to a reduced ability to cope with cadmium stress.

关键词： Iris sanguinea IsUGT78 Stress resistance Cadmium Glucosyltransferase

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Removal Behaviors of Different SiC Ceramics during Polishing

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Journal of Materials Science & Technology 2010年第2期26卷 125-130页

作者： guiling liu, Zhengren Huang , Xuejian liu and Dongliang Jiang Structural Ceramics Center, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China Structural Ceramics Center Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 200050 China

Comparative experiments were conducted to reveal the removal behaviors of three kinds of silicon carbide （SIC） ceramics during polishing and the effects of ceramic microstructure on the surface quality were also reported. Experimental results show that the second phase in SiC ceramics plays an important role in the surface quality when its size is large enough. The surface quality is enslaved to the formation of steps at interfaces between second phase and SiC matrix that results from different elastic modulus and hardness between two phases. Under 3 μm abrasive grains polishing condition, different SiC ceramics show different removal mechanisms. With decreasing abrasive grain size, all of different SiC ceramics exhibit a ductile removal mode, which decreases surface roughness efficiently.

关键词： SiC Surface quality Removal behavior Polishing

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Investigation on the laser ablation of SiC ceramics using micro-Raman mapping technique

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Journal of Advanced Ceramics 2016年第3期5卷 253-261页

作者： Chaoli FU Yong YANG Zhengren HUANG guiling liu Hui ZHANG Fang JIANG Yuquan WEI Structural Ceramic Engineering Research Center Shanghai Institute of CeramicsChinese Academy of Sciences 1295 Dingxi Road Shanghai 200050 China College of Environmental and Chemical Engineering Shanghai University 99 Shangda RoadShanghai 200444 China Structural Ceramic Engineering Research Center Shanghai Institute of CeramicsChinese Academy of Sciences 1295 Dingxi Road Shanghai 200050 China

Research on the laser ablation behavior of SiC ceramics has great significance for the improvement of their anti-laser ability as high-performance mirrors in space and lasers, or the laser surface micro-machining technology as electronic components in micro-electron mechanical systems (MEMS). In this work, the laser ablation of SiC ceramics has been performed by using laser pulses of 12 ns duration at 1064 nm. The laser induced damage threshold (LIDT) below 0.1 J/cm(2) was obtained by 1-on-1 mode and its damage morphology appeared in the form of 'burning crater' with a clear boundary. Micro-Raman mapping technique was first introduced in our study on the laser ablation mechanisms of SiC surface by identifying physical and chemical changes between uninjured and laser-ablated areas. It has been concluded that during the ablation process, SiC surface mainly underwent decomposition to the elemental Si and C, accompanied by some transformation of crystal orientation. The oxidation of SiC also took place but only in small amount on the edges of target region, while there was no hint of SiO2 in the center with higher energy density, maybe because of deficiency of O-2 atmosphere in the ablated area, elimination of SiO2 by carbon at 1505 degrees C, or evaporating at 2230 degrees C.

关键词： silicon carbide (SiC) laser ablation micro-Raman mapping technique decomposition oxidation

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Vote Points to Kyrgyzstan’s Future

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Beijing Review 2010年第28期53卷 14-15页

作者： liu guiling the China Institutes of Contemporary International Relations

Approval of a new Constitution is expected to bring stability to Kyrgyzstan on June 27, a con- stitutional refer- endum was held in Kyrgyzstan. The Central Election Commission

关键词： Vote Points to Kyrgyzstan’s Future

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Playing Hardball

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Beijing Review 2008年第37期51卷 12-13页

作者： liu guiling

Despite Western criticism, Russia appears confident about its decision to recognize Georgia’s breakaway regions as independent states Russian President Dmitry Medvedev declared that Russia would formally recognize th... 详细信息

关键词： Playing Hardball

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Sixty Years and Counting

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Beijing Review 2009年第42期52卷 10-13页

作者： liu guiling

An overview of Si no-Russian relations shows the two countries are bound by history and destiny since 1949, China and Russia have seen their relations evolve through dramatic twists and turns-from a friendly alliance ...

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Russia's Development Strategy

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Contemporary International Relations 2006年第4期16卷 1-16页

作者： Jiang Li liu guiling Li Dong

A complex process characterizes the evolvement of Russia’s develop-ment strategy which has drawn world-wide attention. In the paper, agreat length is given to President Putin’s strategy aimed at promotingeconomic re... 详细信息

关键词：俄罗斯发展战略民主政治经济发展

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冷战结束以来俄日关系的新变化

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现代国际关系 2005年第11期 40-44,62页

作者：刘桂玲中国现代国际关系研究院俄罗斯所

冷战后,俄日关系发生深刻变化,双方摆脱意识形态束缚,从对抗走向合作。近年来,两国关系在国际热点问题、亚太地区安全问题以及双边经济合作问题上取得积极进展。但是,一直悬而未决的“北方领土”问题始终制约两国关系的正常化发展。尽... 详细信息

冷战后,俄日关系发生深刻变化,双方摆脱意识形态束缚,从对抗走向合作。近年来,两国关系在国际热点问题、亚太地区安全问题以及双边经济合作问题上取得积极进展。但是,一直悬而未决的“北方领土”问题始终制约两国关系的正常化发展。尽快解决领土问题是俄日面临的迫切课题。从长远看,无论将来领土问题如何解决,俄日两国互有需求、彼此借重、谋求合作的积极趋势不会逆转。

关键词：俄罗斯日本双边合作北方领土

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Genome-wide identification of agronomically important genes in outcrossing crops using OutcrossSeq

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Molecular Plant 2021年第4期14卷 556-570页

作者： Mengjiao Chen Weijuan Fan Feiyang Ji Hua Hua Jie liu Mengxiao Yan Qingguo Ma Jiongjiong Fan Qin Wang Shufeng Zhang guiling liu Zhe Sun Changgeng Tian Fengling Zhao Jianli Zheng Qi Zhang Jiaxin Chen Jie Qiu Xin Wei Ziru Chen Peng Zhang Dong Pei Jun Yang Xuehui Huang Shanghai Key Laboratory of Plant Molecular Sciences College of Life SciencesShanghai Normal UniversityShanghai 200234China Shanghai Key Laboratory of Plant Functional Genomics and Resources Shanghai Chenshan Plant Science Research CenterChinese Academy of SciencesShanghai Chenshan Botanical GardenShanghai 201602China State Key Laboratory of Tree Genetics and Breeding Key Laboratory of Tree Breeding and Cultivation of the State Forestry and Grassland AdministrationResearch Institute of ForestryChinese Academy of ForestryBeijing 100091China Tai'an Academy of Agricultural Sciences Tai'an 271000ShandongChina National Genomics Data Center Bio-Med Big Data CenterCAS Key Laboratory of Computational BiologyCAS-MPG Partner Institute for Computational BiologyShanghai Institute of Nutrition and HealthChinese Academy of SciencesShanghai 200031China CAS Center for Excellence of Molecular Plant Sciences Institute of Plant Physiology and EcologyShanghai Institutes for Biological SciencesChinese Academy of SciencesShanghai 200233China These authors contributed equally to this article.

Many important crops(e.g.,tuber,root,and tree crops)are *** these crops,no inbred lines are available for genetic study and breeding because they are self-incompatible,clonally propagated,or have a long generation time,making the identification of agronomically important genes difficult,particularly in crops with a complex autopolyploid *** this study,we developed a method,OutcrossSeq,for mapping agronomically important loci in outcrossing crops based on whole-genome low-coverage resequencing of a large genetic population,and designed three computation algorithms in OutcrossSeq for different types of outcrossing *** applied OutcrossSeq to a tuberous root crop(sweet potato,autopolyploid),a tree crop(walnut tree,highly heterozygous diploid),and hybrid crops(double-cross populations)to generate high-density genotype maps for the outcrossing populations,which enable precise identification of genomic loci underlying important agronomic *** causative genes at these loci were detected based on functional *** together,our results indicate that OutcrossSeq is a robust and powerful method for identifying agronomically important genes in heterozygous species,including polyploids,in a cost-efficient *** OutcrossSeq software and its instruction manual are available for downloading at ***/tool/***.

关键词： genotyping genetic mapping outcrossing polyploid

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